/* * (C) Copyright 2003, Psyent Corporation <www.psyent.com> * Scott McNutt <smcnutt@psyent.com> * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #include <command.h> #include <asm/byteorder.h> #include <asm/cache.h> #define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */ int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) { void (*kernel)(int, int, int, char *) = (void *)images->ep; char *commandline = getenv("bootargs"); ulong initrd_start = images->rd_start; ulong initrd_end = images->rd_end; char *of_flat_tree = NULL; #if defined(CONFIG_OF_LIBFDT) /* did generic code already find a device tree? */ if (images->ft_len) of_flat_tree = images->ft_addr; #endif if (!of_flat_tree && argc > 1) of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16); if (of_flat_tree) initrd_end = (ulong)of_flat_tree; /* * allow the PREP bootm subcommand, it is required for bootm to work */ if (flag & BOOTM_STATE_OS_PREP) return 0; if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) return 1; /* flushes data and instruction caches before calling the kernel */ disable_interrupts(); flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE); flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE); debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline); debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end); /* kernel parameters passing * r4 : NIOS magic * r5 : initrd start * r6 : initrd end or fdt * r7 : kernel command line * fdt is passed to kernel via r6, the same as initrd_end. fdt will be * verified with fdt magic. when both initrd and fdt are used at the * same time, fdt must follow immediately after initrd. */ kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline); /* does not return */ return 1; }